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BURKE 6L WRIGHT.

Patented June 25. 1857.

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lill il Inventor.,

Witnesses= @uiten tatesatwt 'fftcef A. M. UEKE AND STEPHEN WRIGHT, oF CLEVELAND, onto. Letters Patent Nu. 65,999, 'dated June 25, 18,67.

tnraovED ,Moos or TEEATING HYDEOGAEBON ons.

TO ALL WHOM IT MAY CONCERNi Y yBe it known that we, A. M'. BURKE and S. WRIGHT, of Cleveland, in the county of Cuyahoga, and State of lClhio, have invented 'certain newl and useful Improvements inthe Mode of Treating Oilsgand we do hereby declare that the following is a full and complete description of the same, reference being had te the accompanying drawings, making part of this specification, in which- Figure .1 is a top view of the still,A

Figure 2 is a transverse section.

Like letters of `reference refer to like parts in the views. I This invention relates to a process of treating petroleum crude mineral oil, or any of its products or distillatcs, by means of which it is raised to a lire test of 1100 and upwards, the oil at the same time assuming and Aretaining a light color andri'icedom from any offensive odor, `and which said process is conducted in the manner asfollows, viz: p

In the still A, iig. 1, which is constructed in the ordinary way, is placed a certain quantity of petroleum or other mineral oil, or their products. To some thirty barrels oi' this oil are added about nine gallons of caustic soda, of 20 Baume, and one-fourth gallon aqua ammonia. This mixture is then distilled and run oil` through the pipes B to an agitator, in which the distillate isfagain treated as follows, viz: to onebarrel of distillate are added about nine and a half pounds sulphuric acid,`tirst by using five and a, half pounds and agitating the mass some twenty minutes by animpcllcd current of air at the bottom of the oil. After being thus agitated, the acid, or as uiuch of it as can be, is then' drawn ofi'. Then in fifteen minutes is drawn lthe balance.v At this time is added thebalance ofthe acid, (four pounds,) and the whole is again agitated for about eighteen minutes, which is then'rallowed to rest and` settle for forty-tive minutes, drawing acid evcry'iifteen. In order to remove all the acid from the oil it is now treatedv with water, thus :y to somcseventy-ve barrels of oil six barrels of water, of a temperature of 120, are added, the whole of which ispiagain agitated iiiteen minutes, adding in the mean time six gallons alkali, 20 Baume, which is now allowed to settle thirty minutes and the water-then drawn oil' again. Thirty gallons ot' alkali, of 20,0 Baume, and forty-eight gallons of water, of 110, are now added, and the whole agitated for fifteen miies, which is then allowed to .sett-lc for thirty minutes'and then drawn ed. For the-#last washing sin" or more barrels of water, 110, are used, and agitated for sonic twenty minutes, which is then allowed to settle some thirty minutos, andthen drawn oti, thus completing the process. Theoil is now white, clear, and free-from any oiieusive odors, and ot' a tireltest of 110 and upward. I

By this process the oil is first treated with alkali and ammonia or with other agents in the still previous to a/.QLSlurng distillation, and which is again treated, when run ofi' inthe agitator, with acids, alkalies,'and vlshingsmiiimtlig usual way. Y The result of this treatment of the oil in the still and agitator is a muchner and better article than can be obtained in the usual methodsimply treating the oil in the agitator only.

The treating of oil chemically, as herein described, in the two apparatuses, viz, still and agitator, is the distinguishing feature of our..improvement.' It will he observed that the still is provided with an eduction pipe, C, iig. 2, leading from one side oithe bottom, the purpose ot" which is to draw off the residual products of the distillation. 'It will be seen` that this pipe is furnished with a stop-plug or valve, l), which is closed and opened by the screw E cut upon theupper endof the valve-stem: hy thus closing the pipeat its conjunction with the still, prevents the passage of the alkali into the pipe. l

It is a well-known fa'ct in chemistry that a solution of potush orsoda, when raised to a high temperature vunder conditions that admit of evaporation, crystallization is the result in solid and compact masses. 'if this precipitation were-allowed-.to be made inthe pipe referred to, it would soon lill up and thereby prevent the .residuum from being` drawn oli` from the still. Hence, by thus closing the pipe at itsconjunction with the still, the crystallized potash or soda is precipitated on the bottom of the still, from which it can'be easily taken up and removed. v

l .What we claiin as our improvement, and desire to secure by Letters latent, is-

1..The herein-described process of consecutively treating oils first by alkali in the still, as speciiied, and subsequently by the use of acids in the agitator as a coiimtinuatiozi of the said process, substantially as set forth.

2,V As a means for'earrying out the herein-described process', we 'claim `:he valve or plug D; provided with suitable devices for operating the same, in combination with the pipe C and still, substantially as described.

A. M. BURKE,

STEPHEN WRIGHT.

Witnesses W. H. BUEEIDeE, J. H. BUERIDGE. 

